Ignition Oscilloscope - Bosch MOT 250 Instrucciones De Manejo

5.1

Ignition oscilloscope

The ignition oscilloscope is selected from the „Engine test" or the
basic menu. Accordingly, the representation may differ slightly
from the picture.
Remarks:
A primary or secondary signal (over 4 kV) is required for triggering
in synch with the engine. If these signals are not present, pulse
shaper 1 687 224 827 must be used for triggering.
5.1.1 Single circuit ignition system with one ignition distributor
F1: Changeover of measuring mode between secondary
oscillogram (pick-off of measured values with clamp-on
pickup or secondary sensor) and primary oscillogram
(pick-off of measured values with green clip).
F2: Changeover between parade representation (the „parade"
corresponds to the representation of the complete ignition
curve) and individual representation of each cylinder.
F3: Call of subprogram: „Picture adjustment" to change the
X-deflection (time axis), the Y-amplification and the picture
position (picture displacement upward or downward).
See Section 5.4.1.
Only activated when the individual picture representation is
selected:
F4: Call of subprogram: To set the pretrigger to displace the
picture or the start of the picture on the X-axis. See
Section 5.4.2.
F5/6: To select the individual cylinders according to firing order
for individual picture representation.
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